function axToolVideoMonitor(layer){
    viewer.camera.flyTo({destination : Cesium.Cartesian3.fromDegrees(120.90286,32.01857,500.0)});
    //调用videoWall函数
    videoFusion();
}

 //封装函数videoFusion
function videoFusion(){
        //获取video标签
        const videoElement = document.getElementById("myVideo");
        //将视频元素与模拟时钟同步
        let synchronizer =  new Cesium.VideoSynchronizer({
            clock:viewer.clock,
            element:videoElement
        })
        //设置自动播放
        viewer.clock.shouldAnimate = true;
        var polygon = viewer.entities.add({
            polygon:{
                hierarchy:new Cesium.PolygonHierarchy(Cesium.Cartesian3.fromDegreesArray(
                    [120.90286,32.01857,
                        120.90295,32.01854,
                        120.90294,32.01844,
                        120.90282,32.01847,
                    ])
                ),
                classificationType:Cesium.ClassificationType.BOTH,
                material:videoElement,
                stRotation:0,
            },
        })
}

